The ADF4159 is a 13 GHz, fractional-N frequency synthesizer with modulation and both fast and slow waveform generation capability. The part uses a 25-bit fixed modulus, allowing subhertz frequency resolution.
The ADF4159 consists of a low noise digital phase frequency detector (PFD), a precision charge pump, and a programmable reference divider. The Σ-Δ-based fractional interpolator allows programmable fractional-N division. The INT and FRAC registers define an overall N divider as N = INT + (FRAC/225).
The ADF4159 can be used to implement frequency shift keying (FSK) and phase shift keying (PSK) modulation. Frequency sweep modes are also available to generate various waveforms in the frequency domain, for example, sawtooth and triangular waveforms. Sweeps can be set to run automatically, or each step manually triggered by an external pulse. The ADF4159 features cycle slip reduction circuitry, which enables faster lock times without the need for modifications to the loop filter.
Control of all on-chip registers is via a simple 3-wire interface. The ADF4159 operates with an analog power supply in the range of 2.7 V to 3.45 V and a digital power supply in the range of 1.62 V to 1.98 V. The device can be powered down when not in use.
ADF4159WCCPZ and ADF4159WCCPZ-RL7 are qualified for automotive.
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|ADF4159: Direct Modulation/Fast Waveform Generating, 13 GHz, Fractional-N Frequency Synthesizer Data Sheet (Rev E, 07/2014) (pdf, 556 kB)||Data Sheets|
|CN-0302: Ultra-Fast Settling PLL with RF to 13 GHz (pdf, 208 kB)||Circuit Note|
|Using ADIsimPLL to Simulate Frequency Ramps on the ADF4158||Videos||HTML|
Fundamentals of Frequency Synthesis, Part 1: Phased Locked Loops
The first of a two-part series on frequency synthesis, with an introduction to Phased Locked Loops. This webcast looks at the need for frequency generation, the techniques from the past present and future, and how to assess the performance of a frequency synthesis, and real world applications. Particular attention will be focused on Phase Locked Loops (PLL's) as frequency synthesizers.
Fundamentals of Frequency Synthesis, Part 2: Direct Digital Synthesis (DDS)
This month we conclude our two-part series on frequency synthesis, with an introduction to Direct Digital Synthesis. We will give a basic review of how a direct digital synthesis system works, touching on the inner workings of the DDS engine at a relatively high level. We will also discuss the tradeoffs between PLL and DDS technology as a base choice for frequency synthesis needs.
|UG-383: Evaluating the ADF4159 Frequency Synthesizer for Phase-Locked Loops (pdf, 757 kB)||User Guides|
|UG-476: PLL Software Installation Guide (pdf, 520 kB)||User Guides|
RF Source Booklet
(PDF, 4353 kB)
RF IC Product Overview - Version P (02/2014)
|Glossary of EE Terms||Glossary||HTML|
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ADIsimPLL™- Version 3.60.10
ADIsimPLL enables the rapid and reliable evaluation of new high performance PLL products from ADI. It is the most comprehensive PLL Synthesizer design and simulation tool available today. Simulations performed include all key non-linear effects that are significant in affecting PLL performance. ADIsimPLL removes at least one iteration from the design process, thereby speeding the design- to-market.
|ADIsim Design/Simulation Tools||HTML|
|ADF4158 and ADF4159 Evaluation Board Software (zip, 1227 kB)||Evaluation Software||ZIP|
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